PlantSME Plant secondary metabolism enzyme database
Steroid portable pathway

Steroid portable pathway

Category：Steroid pathway

Steroid pathway definition imported from the 2026-05-17 portable BLAST/HMM package.

Representative Steroid Reaction Route
Squalene to phytosterols and brassinosteroid branch. The steroid route starts from triterpenoid precursors, proceeds through squalene, 2,3-oxidosqualene, and cycloartenol, and then branches toward phytosterols and brassinosteroids; long branches are shown as curated modules.
3 curated steps/modules
Sterol Scaffold Formation
01
Substrate
Farnesyl diphosphate
C15H28O7P2
C15 prenyl-OPP
Squalene synthesis, epoxidation, and cyclization
SQS/FDFT190 SQE37 CAS726
Product
Cycloartenol
C30H50O
tetracyclic sterol nucleus with cyclopropyl side
SQS/SQE/CAS convert FPP-derived linear triterpenes into the plant sterol core.
02
Substrate
Cycloartenol-series intermediates
C28-C30 sterols
tetracyclic sterol nucleus
Demethylation, reduction, and side-chain remodeling
SMT1/SMT2/SMT3593 SMO1/SMO2208 CPI118 CYP51G1179 FK18 HYD122 DWF7106 DWF55 DWF128
Product
Phytosterols
C28H48O / C29H50O
sterol nucleus-C8/C9 side chain
This segment converts cycloartenol-series intermediates into phytosterol pools such as sitosterol and campesterol.
Brassinosteroid Branch
Lineage Distribution
Assignments under this module are distributed across the following plant lineages.
All Lineages Basal angiosperms (2224)
Current lineage filter: Basal angiosperms. All species, family, module, and gene statistics below have been narrowed to this lineage.
Algae
Hits0
Bryophytes
Hits0
Lycophytes/Ferns
Hits0
Gymnosperms
Hits0
Basal angiosperms
Hits2224
Monocots
Hits0
Eudicots
Hits0
Species Distribution
Brasenia schreberi
Annona cherimola
Cinnamomum kanehirae
Cinnamomum camphora
Chloranthus sessilifolius
Amborella trichopoda
Piper nigrum
Aristolochia contorta
Nymphaea colorata
Liriodendron chinense
Lineage Summary
Basal angiosperms
2224
Module Gene List
Reset
GeneSpeciesProtein ID
SAchi11G0015890.1 saururus_chinensis SAchi11G0015890.1
SAchi11G0017870.1 saururus_chinensis SAchi11G0017870.1
SAchi11G0019140.1 saururus_chinensis SAchi11G0019140.1
SAchi11G0019250.1 saururus_chinensis SAchi11G0019250.1
SAchi11G0019260.1 saururus_chinensis SAchi11G0019260.1
SAchi11G0021880.1 saururus_chinensis SAchi11G0021880.1
SAchi11G0021920.1 saururus_chinensis SAchi11G0021920.1
warburgia_ugandensis_GWHPDQZE000083 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE000083
warburgia_ugandensis_GWHPDQZE000087 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE000087
warburgia_ugandensis_GWHPDQZE000317 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE000317
warburgia_ugandensis_GWHPDQZE000318 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE000318
warburgia_ugandensis_GWHPDQZE001154 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE001154
warburgia_ugandensis_GWHPDQZE001159 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE001159
warburgia_ugandensis_GWHPDQZE001245 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE001245
warburgia_ugandensis_GWHPDQZE001614 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE001614
warburgia_ugandensis_GWHPDQZE001821 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE001821
warburgia_ugandensis_GWHPDQZE002127 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE002127
warburgia_ugandensis_GWHPDQZE003401 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE003401
warburgia_ugandensis_GWHPDQZE003412 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE003412
warburgia_ugandensis_GWHPDQZE004317 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE004317
warburgia_ugandensis_GWHPDQZE004391 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE004391
warburgia_ugandensis_GWHPDQZE004458 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE004458
warburgia_ugandensis_GWHPDQZE004459 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE004459
warburgia_ugandensis_GWHPDQZE004595 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE004595
warburgia_ugandensis_GWHPDQZE005431 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE005431
warburgia_ugandensis_GWHPDQZE005725 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE005725
warburgia_ugandensis_GWHPDQZE006421 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE006421
warburgia_ugandensis_GWHPDQZE006451 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE006451
warburgia_ugandensis_GWHPDQZE006744 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE006744
warburgia_ugandensis_GWHPDQZE006747 warburgia_ugandensis warburgia_ugandensis_GWHPDQZE006747